Yanmar 4LHA-HTP Operation Manual page 548

Chapter 7 Reduction and Reversing Gear
3. Inspection and Servicing
3-5-1 Lapping Procedure for Drive Cone
( l ) C o a t the lapping powder onto the cave of the clutch
gear (Lapping powder: 67 micron silicon carbide #280).
(2)Set the clutch gear on the clutch shaft with a needle
bearing and then set the drive cone on the clutch shaft
(3)Lap the clutch gear's cave and drive cone, pushing them
together by hand.
(4)Push and turn the clutch gear about 5 times both clock-
wise and counter-clockwise.
(5)After lapping them, wash them w i t h washing oil.
The lapped parts should be cleaned completely.
NOTE:Do not mix the combination
The washing oil should be changed frequently
order to prevent
parts.
When assembling
its alignment
The larger chamferring
clutch gear (A) side.
7-1-12
4LHA Series
of the lapped
residual powder being left on the
the drive cone, be sure to check
face should be on
parts.
in
the